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2. Start-up
2.1 Warm-up phase
After switch on the warm-up phase starts. It lasts between 60 seconds and four minutes.
Should the EPROM in the sensor head have no valid parameters the warm-up phase will always
last four minutes.
The maximum warm-up time will arise when the instrument has not been used for a long time.
During warm-up time a running bar can be seen in the bar graph display which is a symbol for
the progress of the warm-up phase.
At the end of the warm-up phase a zero calibration will be done. Should the sensor resistance
be out of the tolerance window a failure message will be indicated.
During warm-up phase the actual battery voltage can be displayed via the „I/O“ button. The
display will return to the running bar after some seconds.
An exchange of the sensor head should just be done when the instrument is switched off. It is
done when the instrument is switched on a warm-up phase will be run automatically.
During the first 10 seconds of the warm-up phase the voltage consumption of the LSG/LGK is
higher than in normal operation.
2.2 Measurement
At the end of the warm-up phase a signal beep will sound and the actual sensor value will be
taken as „Zero Concentration“ (zero setting). Out of this zero setting and the value of 1000 ppm
calibration which is stored in the sensor head the senor characteristics for the measurement will
result.
In this mode following display mode can be selected via the “I/O” button:
−
Display of gas concentration. With the “Hold” button a new zero point can be taken
(smallest button is blinking). The former zero point can be restored by long pressing of
the “Hold” button.
−
Setting of the sensitivity (blinking bar). Selection via “Hold” button.
−
Battery display (Battery symbol is displayed ). Via the “Hold“ button the activation of the
LCD lightning and the ppm beep is possible.
